Cushion material for hot-press and use of the same

Abstract

A cushion material for a hot-press is provided. The cushion material comprises: a substrate; and a fiber material, the thermal conductivity coefficient of which is lower than about 0.15 W/m·K at about 20° C. and increases with increasing temperature, for example, the thermal conductivity coefficient may be higher than about 0.20 W/m·K at about 160° C., wherein the fiber material is needle-punched on the substrate.

What is claimed is: 
     
         1 . A cushion material for hot-press, comprising:
 a substrate; and   a fiber material having a thermal conductivity coefficient which is lower than about 0.15 W/m·K at about 20° C. and increases with increasing temperature, wherein the fiber material is needle-punched on the substrate.   
     
     
         2 . The cushion material of  claim 1 , wherein the thermal conductivity coefficient of the fiber material is higher than about 0.20 W/m·K at about 160° C. 
     
     
         3 . The cushion material of  claim 1 , wherein each of the fiber material and the substrate has a thermal degradation temperature and both the thermal degradation temperatures of the fiber material and the substrate are higher than 350° C. 
     
     
         4 . The cushion material of  claim 1 , wherein the fiber material is essentially composed of a poly-paraphenylene terephthalamide fiber. 
     
     
         5 . The cushion material of  claim 1 , wherein the fiber material is essentially composed of a poly-paraphenylene terephthalamide fiber and a fiber selected from a group consisting of a poly-metaphenylene isophtalamide (MPIA) fiber, a heteroatom-containing aromatic fiber, an aromatic heterocyclic fiber, a graphitized carbon fiber, a novolac fiber (Kynol), a melamine formaldehyde (MF) fiber, a polytetrafluoroethylene (PTFE) fiber, a Visit fiber and combinations thereof. 
     
     
         6 . The cushion material of  claim 5 , wherein the fiber material is essentially composed of a poly-paraphenylene terephthalamide fiber and a poly-metaphenylene isophtalamide fiber, and the amount of the poly-metaphenylene isophtalamide fiber is about 5 wt % to about 45 wt % based on the total weight of the fiber material. 
     
     
         7 . The cushion material of  claim 1 , wherein the substrate is substantially composed of a fiber selected from a group consisting of a poly-paraphenylene terephthalamide fiber, a poly-metaphenylene isophtalamide fiber, a heteroatom-containing aromatic fiber, an aromatic heterocyclic fiber, a graphitized carbon fiber, a novolac fiber, a melamine formaldehyde fiber, a polytetrafluoroethylene fiber, a glass fiber, a Visil fiber and combinations thereof. 
     
     
         8 . The cushion material of  claim 7 , wherein the substrate is substantially composed of a poly-metaphenylene isophtalamide fiber. 
     
     
         9 . The cushion material of  claim 1 , which has a basis weight of about 200 g/m 2  to about 3000 g/m 2 . 
     
     
         10 . The cushion material of  claims 1 , wherein at least one surface of the cushion material is further covered with a fiber layer, a teflon layer or a metal layer. 
     
     
         11 . The cushion material of  claim 10 , wherein the fiber layer is substantially composed of a fiber selected from a group consisting of a poly-paraphenylene terephthalamide fiber, a poly-metaphenylene isophtalamide fiber, a heteroatom-containing aromatic fiber, an aromatic heterocyclic fiber, a graphitized carbon fiber, a novolac fiber, a melamine formaldehyde fiber, a polytetrafluoroethylene fiber, a glass fiber, a Visil fiber and combinations thereof. 
     
     
         12 . A method for manufacturing a laminate, comprising hot-pressing a plurality build-up layers by a hot-pressing device, wherein the cushion material of  claim 1  is present between the hot-pressing device and the build-up layers.